Bearings

Sep 9, 2026
Sep 9, 2026
URBAN ECONOMICS · quantitative analysis across 37 US cities and four countries · Jul 2026

Environmental Law Quietly Ended All US Land Reclamation

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Setup. American coastal cities used to grow by building new land into the water. Boston's Back Bay, Chicago's Northerly Island, and the ground under Newark, Logan and SFO airports all began as shallow bay. About 8 percent of the land in major US coastal cities was made this way, and land values there have since risen thirtyfold.

The finding. Economist Maxwell Tabarrok tested the two standard explanations for why reclamation stopped: that cities ran out of shallow water, or that better transport made new land unnecessary. Neither fits the timing. The halt is near-simultaneous across every city he could measure, and lines up with NEPA, the Clean Water Act, and related laws passed in the 1970s. "Of the 37 cities for which we can find data, every one reclaimed land more slowly after 1970, with many, such as Seattle and Chicago, slowing to zero." One Virginia port expansion has now taken 28 years and counting.

Where it stands. This is a data-driven analysis, not a peer-reviewed paper, built from reclamation rates, water depth and cost history. It gains support from an almost identical stop in the Netherlands, Germany, France and Canada, each right after its own environmental law. The weaker link is causation: the same-decade pattern across countries is suggestive, not proof.

Maxwell Tabarrok · Works in Progress, Jul 2026
PSYCHOLOGY · named effect, replicated across decades of behavioral experiments · 2007

Compassion Collapses at the Second Victim, Not the Thousandth

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Setup. A single named victim reliably moves people to give. Add a second victim and the pull already weakens. Psychologist Paul Slovic named this compassion fade: empathy and donations fall as the number of people needing help rises, the opposite of how a rational value of lives should behave.

The finding. Slovic's research puts a number on the drop. In one measure of willingness to pay for saving lives, "when one life is at risk, the value is $100; when ten lives are at risk, the value decreases to $80; and when fifty lives are at risk, the value decreases to $50." The mechanism runs through the affect heuristic: people respond to a vivid image of one victim, which a crowd cannot supply, so the fast emotional system disengages. People who reason more numerically show a flatter, more rational curve.

Where it stands. This is a well-replicated finding across decades of Slovic's lab work and related research on the identifiable victim effect and the bystander effect. It explains a real pattern in charitable giving and disaster response, not just a lab curiosity. The open question is how much of the effect is fixed wiring versus something that better framing of statistics can correct.

Paul Slovic · Wikipedia, 2007
DECISION THEORY · controlled comparison against statistical models, out-of-sample · 1996

A One-Cue Rule Beats Regression at Prediction

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Setup. Standard decision theory assumes a good choice weighs every available reason and combines them. Psychologists Gerd Gigerenzer and Daniel Goldstein tested a cruder rule against that assumption: look at cues one at a time, ranked by how reliable each has been before, and stop the moment the first one tells the options apart.

The finding. They set the heuristic against linear regression on the task of naming the larger of two German cities from partial clues, such as whether each is a state capital. Fit to known data, regression won by a hair. Tested on new, unseen city pairs, the simple rule pulled ahead: "regression had on average 71.9% correct, Take-the-best had 72.2% correct, and unit with linear had 71.4% correct. The take-the-best heuristic was more accurate than regression in this case." The same one-reason approach has since modeled how customs officers and burglars decide.

Where it stands. This is a measured, replicated result in the "fast and frugal heuristics" research program, not a single anecdote. It holds specifically for generalizing to new cases under uncertainty, where a complex model can overfit; regression still wins when fitting known data. The lesson transfers to any setting where more inputs get added for their own sake.

Gerd Gigerenzer and Daniel Goldstein · Wikipedia, 1996
POLITICAL ECONOMY · analysis in a 2026 book, reviewed by an academic economist · Aug 2026

Big Tech Rules Through Networks It Does Not Own

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Setup. Older monopolies grew by owning their whole supply chain. Economist Cecilia Rikap's new book "The Rulers" argues today's technology giants, Apple, Amazon, Microsoft, Alphabet, no longer need to own a business to control it, and asks how that changes corporate power.

The argument. Rikap calls these firms "intellectual monopolies." They fund and coordinate networks of nominally independent companies that generate knowledge the parent firm can extract value from without owning them outright. "Uber has invested in over 30 autonomous vehicle companies to ensure an early foothold in the market for self-driving cars, for example," reviewer Tim Christiaens writes. That control produces two kinds of power: surveillance, from pooling data across the network, and chokepoints, like TSMC's grip on chip production, that let a firm set terms for everyone downstream.

Where it stands. The book's account of how these networks work, documented across venture funding, cloud contracts, and research funding, is treated by the reviewer as its strongest contribution. Rikap's proposed fix, full government "decoupling" from Big Tech infrastructure, is offered with less evidence than the diagnosis and reads as more aspirational.

Tim Christiaens · LSE Review of Books, Aug 2026
GAME THEORY · political science model, tested against two historical cases · 1988

Domestic Politics Decides Which International Deals Survive

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Setup. A treaty is not settled at the negotiating table alone. Political scientist Robert Putnam modeled international bargaining as two games running at once: one between the two governments, and one between each government and the domestic groups who must ratify whatever it signs.

The argument. Putnam calls the range of deals a country's domestic side will accept its "win-set." "International agreements only occur when there is an overlap between the win-sets of the states involved in the international negotiations." A government with a narrow win-set, tight domestic support, can gain leverage abroad, since it can credibly say its hands are tied. The model traces to a real failure: Anglo-Argentine talks before the Falklands War produced tentative deals that domestic politics on both sides never ratified.

Where it stands. This is a structural framework, not a single measured effect, and it has stayed the standard way political scientists explain why technically sound deals collapse, from the Falklands to recent climate negotiations. Its limit is that a "win-set" is easier to name after a negotiation fails than to measure in advance.

Robert D. Putnam · Wikipedia, 1988
Sep 8, 2026
PHILOSOPHY OF MIND · an essayist's argument built on a 1929 philosophical manuscript and psychology experiments · Aug 2026

Why Generalizations Survive The Exceptions That Refute Them

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Setup. In 1929 the philosopher Frank Ramsey wrote private notes on what it means to believe a generalization, such as "all humans are mortal." His friend Richard Braithwaite found the notes after Ramsey died at 26. Ramsey broke from his mentor Ludwig Wittgenstein, who held that a generalization is really an infinite list of facts about each case.

The argument. Ramsey argued that believing a generalization means holding a disposition, a habit for treating any new case a certain way, not a claim about every case at once. Writer Tom Ralston extends this to "generic" claims without a quantifier, like "cats are furry" or "mosquitoes carry West Nile virus." These survive known exceptions because they never claimed to cover every case. "People will accept that mosquitoes carry the West Nile virus even when they are aware that only 1 per cent of mosquitoes are carriers," Ralston writes, citing philosopher Sarah-Jane Leslie. Stereotypes share this structure.

Where it stands. The universal-versus-generic distinction is well established in philosophy of language and explains a real asymmetry: one exception kills "all cats are furry" but not "cats are furry." Whether this excuses stereotyping, rather than only explaining it, stays a live disagreement.

Tom Ralston · Aeon, Aug 2026
ECONOMIC HISTORY · a 1944 doctoral thesis, contested with numbers on both sides · 1944 to present

Britain Freed The Slaves When Slavery Stopped Paying, Not Before

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Setup. Eric Williams, later Trinidad and Tobago's first prime minister, published his Oxford doctoral thesis in 1944. He asked why Britain abolished the slave trade in 1807 and slavery in 1833, against the standard account crediting abolitionist moral conviction.

The argument. Williams argued the timing was economic: by the 1820s Caribbean sugar plantations had exhausted their soil and profits were falling, and Britain's turn toward free trade and industrial capital no longer needed the triangular trade. He also argued slave-trade profits had helped finance the Industrial Revolution.

Where it stands. The debate has run for eighty years with real numbers on both sides. "Stanley Engerman finds that even without subtracting the associated costs of the slave trade or reinvestment of profits, the total profits from the slave trade and of West Indian plantations amounted to less than 5% of the British economy during any year of the Industrial Revolution," cutting against the financing claim. Historian Seymour Drescher countered that abolition came while the colonies were still profitable, driven instead by public moral outrage. Both theses have genuine evidence behind them.

Eric Williams · Capitalism and Slavery, 1944
TERRORISM STUDIES · a database study of 315 attacks, contested on methodology grounds · 2005

Suicide Terrorism Targets Occupation, Not Religion

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Setup. Political scientist Robert Pape built a database of every suicide terrorist attack worldwide from 1980 to 2003, all 315 of them, at the University of Chicago. Before this, explanations for suicide terrorism leaned on Islamic fundamentalism or economic desperation. Pape set out to test that assumption against the full record instead of a handful of cases.

The finding. Pape classified 301 attacks into 18 campaigns by 11 groups and found a pattern: "what nearly all suicide terrorist attacks have in common is a specific secular and strategic goal: to compel modern democracies to withdraw military forces from territory that the terrorists consider to be their homeland." Only one of the ten main groups shared a religion with its occupier. Attackers were rarely poor or isolated. Most were educated and socially integrated.

Where it stands. The 315-attack database is real and widely cited, but Princeton political scientists Ashworth, Clinton, Meirowitz, and Ramsay showed Pape sampled only cases with suicide terrorism, not the 49 of 58 democratic occupations that produced none, leaving the actual cause of the split untested. The occupation pattern in his data holds. What explains it remains disputed.

Robert Pape · Dying to Win, 2005
ORGANIZATIONAL THEORY · a 1963 academic book, foundational and still cited · 1963

Firms Settle For Good Enough, Not The Best Possible

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Setup. Economic textbooks model a firm as a single rational actor maximizing profit under perfect information. In 1952, economist Richard Cyert and political scientist James March met at Carnegie Mellon and set out to test that model against how real firms actually decide.

The argument. Cyert and March described a firm as a coalition of managers, workers, and shareholders, each with different goals and information, that negotiates rather than optimizes. "Cyert and March proposed that real firms aim at satisficing rather than maximizing their results," settling for good enough instead of the best possible outcome. The gap between total resources and what efficiency strictly requires, paid out as high dividends, low prices, or excess wages, they called organizational slack. Rather than a flaw, they argued it stabilizes the coalition and gives the firm room to adapt.

Where it stands. The theory reshaped organizational research and later work on organizational learning and firm strategy. Critics call the coalition model unnecessarily complex and still defend profit maximization over satisficing as the better predictor. Six decades on, both the theory and the argument against it remain active.

Richard Cyert and James March · A Behavioral Theory of the Firm, 1963
HISTORICAL GEOGRAPHY · a 1997 academic book, widely reviewed · 1997

Continents Are A Cultural Map, Not A Natural One

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Setup. School geography divides the world into seven continents, treated as if the divisions were as natural as mountains or rivers. In 1997, geographer Martin Lewis and historian Kären Wigen set out to trace where that seven-part scheme actually came from.

The argument. Lewis and Wigen showed the standard continents, and categories like East versus West or First World versus Third World, are historical inventions layered onto a physical world that does not respect them. "The authors trace the historical development of these misconceptions and highlight the interconnectedness of Europe, Asia, and Africa as part of a single landmass," one summary notes. They proposed replacing the scheme with regions defined by shared history rather than by supposed continental traits.

Where it stands. Reviewers across geography, history, and anthropology called the historical critique sound and well documented. Their own replacement scheme drew real pushback: a New York Times review noted it applies language as the defining trait in some regions and race in others, the same kind of inconsistency the book set out to expose in the old system.

Martin W. Lewis and Kären E. Wigen · The Myth of Continents, 1997
Sep 7, 2026
SOCIAL PSYCHOLOGY · a 1966 lab experiment, replicated and extended since · 1966 to 1972

A Skilled Person's Blunder Makes Them More Likable

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Setup. In 1966, psychologist Elliot Aronson wondered whether making a mistake helps or hurts how likable someone seems. He had University of Minnesota students listen to a mock quiz-show contestant answer questions either almost perfectly or only fairly well, then had the contestant spill a cup of coffee near the end.

The finding. "Aronson's research found that a knowledgeable blunderer was rated to be more attractive, while the more average ones suffered decreases in their perceived attractiveness." A skilled person's blunder humanizes them; the same blunder from an average performer just confirms their mediocrity.

Where it stands. Later studies refined the effect rather than breaking it: it strengthens with a more severe blunder for the competent person, reverses more for men than women, and even predicts real purchase behavior. In one field study, shoppers were more likely to buy a chocolate bar advertised as "broken" when they were distracted, though the same flaw hurt sales when shoppers were paying close attention.

Elliot Aronson · Wikipedia · 1966
ORGANIZATIONAL THEORY · a 1972 formal model, tested by computer simulation · 1972

Institutional Decisions Are Not Made To Solve Problems

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Setup. In 1972 researchers Michael Cohen, James March and Johan Olsen studied "organized anarchies," institutions such as universities where goals are unclear and who shows up to a meeting keeps changing. They built a computer model of how choices actually happen inside one.

The finding. Their garbage can model treats problems, solutions, participants and choice opportunities as four separate streams that flow independently and combine mostly by chance, timing and who is in the room. A solution can exist before anyone has the problem it fixes. "Important problems were found more likely to be solved than unimportant ones, and important choices were less likely to solve problems than unimportant ones." Decisions often resolve nothing, or resolve a problem that already left the room.

Where it stands. The model grew out of watching a real university dean search collapse into confusion, then was formalized in a Fortran simulation. It has held up as a working description of institutional life for over fifty years, still taught in organizational theory, precisely because it does not assume decision-makers are rational.

Michael Cohen, James March and Johan Olsen · A Garbage Can Model of Organizational Choice, 1972
MEDIA AND COMMUNICATION · a 1940 panel study of 2,400 voters, later revised for digital platforms · 1940 to 1955

Most Opinions Come From a Person, Not the Media

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Setup. In 1940, sociologist Paul Lazarsfeld and colleagues tracked 2,400 voters in Erie County, Ohio, through the presidential campaign, interviewing them repeatedly from May to November to find out what actually changed their minds.

The finding. "The study found that people were more likely to have conversations about politics with those around them than to consume political media. These conversations were more likely to sway voters than the political press was." Lazarsfeld named the people doing the swaying "opinion leaders": more exposed to media, more trusted locally, and the ones who translated broadcast messages into something their neighbors would act on. Mass media, in other words, mostly worked at one remove.

Where it stands. The finding held up long enough to become a textbook model, then got complicated by digital platforms. Studies of Twitter have since found genuine two-step patterns alongside faster one-step and multi-step flows, so the original two-hop picture is now one case among several rather than the whole story.

Paul Lazarsfeld and Elihu Katz · Personal Influence, 1955
SOCIAL THEORY · a 1989 book, prize-winning and still contested · 1989

Bureaucracy, Not Barbarism, Made The Holocaust Possible

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Setup. Zygmunt Bauman was a Polish-British sociologist who, in 1989, set out to explain the Holocaust not as a relapse into pre-modern cruelty but as something modernity itself made possible.

The argument. "Bauman's most famous book, Modernity and the Holocaust, argues that the Holocaust was fundamentally enabled by the features of modernity itself—bureaucratic rationality, instrumental reason, and the social production of moral indifference." Breaking mass murder into small procedural tasks, each carried out by someone following rules rather than choosing violence, let ordinary bureaucratic machinery do the killing while nobody involved had to feel like a murderer. Bauman argued the same sorting-and-excluding logic remains available to modern societies today, not confined to Nazi Germany.

Where it stands. The book won the European Amalfi Prize in 1989 and reshaped how sociologists frame the Holocaust, moving the explanation toward institutional design rather than individual pathology. Reviewers called it important but flagged real gaps: sociologist Moishe Postone found several central claims puzzling, and later critics argue Bauman understates how ordinary antisemitism, not just bureaucracy, motivated the killers.

Zygmunt Bauman · Modernity and the Holocaust, 1989
LAW AND ECONOMICS · a 1998 legal thesis, formalized and tested across many cases · 1998 to present

Too Many Owners Waste A Resource Just Like Too Few

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Setup. Law professor Michael Heller named this pattern in 1998 after noticing something odd in post-communist Eastern Europe: cities full of empty storefronts, even though demand for retail space was high and everyone with a stake in the empty stores was losing money.

The mechanism. The tragedy of the commons happens when nobody owns a resource, so everyone overuses it. "The 'tragedy of the anticommons' occurs when a resource has many owners, all of whom have the ability to exclude others from using it, leading to the under-utilization of that resource." In Heller's stores, too many separate parties each held a veto, so no deal could close. He traced the same pattern in medieval Rhine river tolls, biomedical patents that block research, and zoning that blocks housing.

Where it stands. James Buchanan and Yong Yoon formalized the model in 2000, and it has since been applied to patent thickets, COVID-19 vaccine disputes, and housing shortages, mostly by pointing to real blocked deals rather than new formal tests. Critics note the pattern is not universal: surveys of scientists found patents have not obviously stalled biomedical research the way the theory predicts.

Michael Heller · Harvard Law Review, 1998
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